Spinal accessory nucleus

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Brain: Spinal accessory nucleus
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The cranial nerve nuclei schematically represented; dorsal view. Motor nuclei in red; sensory in blue. (Spinal accessory nucleus is at "XI".)
Latin nervus spinalis nervi accessorii
NeuroNames ancil-999
Dorlands/Elsevier n_11/12583456

The spinal accessory nucleus lies within the cervical spinal cord (C1-C5) in the ventral horn. The nucleus ambiguus is classically said to provide the "cranial component" of the accessory nerve. However, the very existence of this cranial component has been recently questioned and seen as contributing exclusively to the vagus nerve.

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